Ions, you would rather have Keldorn hitting on you?

Lora, yes she can. As a matter of fact I used her instead of Cernd. Jaheira mopped the floor with whatever her name was. I had her cast a Nymph, who cast hold monster on her.
Then I had Jaheira summon monsters 111. Two winter wolves popped in and toasted the bad girl while she was held. Jaheira didn't take a single hit.

Arf! No not that stuffed shirt Keldorn. I meant Korgan...Its that Helmet of his...

'scuse me im going to have a moment...

After hearing all the pro Jaheira hoopla, I decided to check her out again. I must admit after picking her up I was doubtful, but she is proving very tough. I did edit her slightly with shadowkeeper, but I only added the experience points she missed out on while dropped. I went to some stores and equipped her nicely, and it appears we are in business agian.
Is the romance only a non sanctioned add on, or is it part of the original game?

I personaly think she is ok. I just think that she needs better shapechanging abilitises.

Jaheira's one of the female NPCs you can have a romance with, it's not a third-party script. I don't use shapechanging abilities with Jaheira at all. They were useful in BG1, useless in BG2. What can a bear do against a troll? Her tanking ability and excellent spells are enough for me, anyway.
Ah, and Ions... we can't expect much of an opinion about Jaheira (or any woman for that matter) from someone who prefers dwarves, hmm? Maybe you just go for that bearded look or something.

Ronn, there is a third party romance patch you can add that allows you to have all 3 romances concurrently. Most of us developed what has been dubbed the Jaheira, Aerie or Viconia movement but at some point in chapter 3 or 4, where they refuse to move, or move only in small increments. The only recourse being to remove the patch files.

You guys are all forgetting (well I know Armisael isn't) the main reason Jaheira kicks major ass aside from her tanking abilities - Insect Plague which causes 100% spellcasting failure.